Finding the Terms and Proving Induction for a Numerical Sequence

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SUMMARY

The discussion centers on the numerical sequence defined by a1 = 3 and an = a[n/2] for n ≥ 2. Participants are tasked with calculating the first eight terms of the sequence and proving that an = 3 for all n ≥ 1. The terms are derived by recursively applying the definition, leading to a consistent value of 3 across all terms. The proof involves mathematical induction, confirming that the sequence remains constant regardless of n.

PREREQUISITES
  • Understanding of mathematical induction
  • Familiarity with sequences and series
  • Knowledge of the floor function [x], representing the largest integer less than or equal to x
  • Basic algebraic manipulation skills
NEXT STEPS
  • Study the principles of mathematical induction in detail
  • Explore the properties of the floor function [x] and its applications
  • Practice deriving terms of sequences using recursive definitions
  • Learn how to construct formal proofs for sequences and series
USEFUL FOR

Students in mathematics, particularly those studying sequences, series, and proof techniques, as well as educators looking for examples of mathematical induction applications.

snaidu228
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Homework Statement


If x is a real number, we de fine [x] as being the largest integer <= x. For example, [1.2] = 1,
[-1.1] = -2, [1] = 1, [11/3]3 = 3, . . .
Let {an}n>=1 be the numerical sequence de fined by:
a1 = 3; and an = a[n/2], for n>=2

(a) Give the terms a1; a2; ... ; a8 of this sequence.
(b) Prove that an = 3; For all n>=  1


Homework Equations





The Attempt at a Solution



I'm not sure what induction has to do with this... I don't really get it.
 
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snaidu228 said:

Homework Statement


If x is a real number, we de fine [x] as being the largest integer <= x. For example, [1.2] = 1,
[-1.1] = -2, [1] = 1, [11/3]3 = 3, . . .
Let {an}n>=1 be the numerical sequence de fined by:
a1 = 3; and an = a[n/2], for n>=2

(a) Give the terms a1; a2; ... ; a8 of this sequence.
(b) Prove that an = 3; For all n>=  1


Homework Equations





The Attempt at a Solution



I'm not sure what induction has to do with this... I don't really get it.

Write out a few terms of the sequence to get a feel for what it's doing.
a1 = 3, a2 = ?, a3 = ?, a4 = ? And so on, through a8. That's part a.
 

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